CN103423731B - Coal gasification direct combustion boiler based on PLC control - Google Patents
Coal gasification direct combustion boiler based on PLC control Download PDFInfo
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- CN103423731B CN103423731B CN201310316975.0A CN201310316975A CN103423731B CN 103423731 B CN103423731 B CN 103423731B CN 201310316975 A CN201310316975 A CN 201310316975A CN 103423731 B CN103423731 B CN 103423731B
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Abstract
The invention discloses a coal gasification direct combustion boiler based on PLC control. The coal gasification direct combustion boiler comprises a gas generator and a steam boiler, and further comprises a control mechanism and an actuating mechanism, wherein the control mechanism comprises a main controller and a PLC, and the PLC is in control connection with the actuating mechanism according to the main controller. The coal gasification direct combustion boiler based on PLC control has the advantages of being high in automation degree, high in gas conversion and good in stability of operation.
Description
Technical field
The invention discloses a kind of coal gasification direct-combustion boiler, specifically refer to a kind of coal gasification direct-combustion boiler controlled based on PLC.
Background technology
The existing coal-burned industrial boiler thermal efficiency is generally low, and Air Pollutant Emission exceeds standard, and does not meet the situation demands of current energy-saving and emission-reduction.And fuel-oil or fuel-gas boiler operating cost is high, general user is difficult to bear.
Coal gasification direct-combustion boiler is a kind of equipment coal being changed into coal gas and then carry out the generation steam burnt, compared to traditional coal-burning boiler, and operating cost is low, environmental pollution is little advantage that it has.The structure of existing coal gasification direct-combustion boiler includes gas generator and steam boiler, the outer wall of wherein gas generator is arranged with water leg, water leg is connected with the water leg drum that water supply chuck supplies water, in addition gas generator is provided with an air inlet mechanism, for the coal gas produced in gas generator is flowed to steam boiler, and steam boiler is arranged secondary air mechanism, for providing the oxygen (air) of boiler combustion.But the problem existing for this coal gasification direct-combustion boiler is:
(1) transformation efficiency of coal gasification is lower, and then causes the thermal efficiency of whole boiler on the low side.The present inventor finds through research, in gas generator, saturation temperature is very huge on the impact of coal gas generation efficiency, and saturation temperature is directly determined by the saturated vapor produced in water leg, but in boiler technology field, also do not have ready-made control device can carry out fine adjustment and control to saturated vapor, be therefore necessary to improve;
(2) water level of drum is all adopt manually to add control, therefore needs artificial nurse, and labour intensity is large, and in water leg steam water-level deficiency easily occurring and causes, retaining is not enough, and then causes gas generator temperature too high, occurs potential safety hazard.In addition, the water level of drum also directly has influence on the saturated vapor generation of the water leg be connected with drum, therefore also needs to control steam water-level when controlling steam simultaneously;
(3) primary air flow of existing coal gasification direct-combustion boiler and secondary air flow are all controlled by the experience of boiler master worker, inconvenient operation, and easily there is operate miss, affect the efficiency of combustion of steam boiler.
Summary of the invention
The object of the invention is the shortcoming and defect existed to overcome prior art, and provide one automatically to control water leg water supply and row's steam, thus ensure that gas generator normally works, and proportion adjustment can be carried out to First air and Secondary Air, thus improve the coal gasification direct-combustion boiler controlled based on PLC of boiler combustion efficiency.
For achieving the above object, the technical solution of the utility model is that coal gasification direct-combustion boiler includes gas generator and steam boiler, the two is connected by gas pipeline, described steam boiler is provided with steam outlet pipe, burner and ignition is provided with in this steam boiler, water leg is arranged with outside gas generator, also comprise water leg drum, an air inlet mechanism, secondary air mechanism and negative pressure induced wind machine, this water leg drum is connected by water leg water supply line with water leg, this air inlet mechanism includes primary air fan and is connected to a blast pipe on primary air fan, the described port of export of a blast pipe is communicated with the furnace chamber of gas generator, described secondary air mechanism includes overfire air fan and secondary air channel, the port of export of this secondary air channel is connected with steam boiler, described negative pressure induced wind machine is communicated with the burner hearth of steam boiler by negative pressure induced wind pipe, described water leg is provided with saturated vapor pipeline, the output of this saturated vapor pipeline is connected with the furnace chamber of gas generator, this water leg water supply line relative to the height of the water side of water leg drum higher than the height of the water inlet end of the relative water leg of water leg water supply line, also include controlling organization and executing agency,
Described executing agency includes the electric control valve be arranged on saturated vapor pipeline and the magnetic valve be arranged on water leg water supply line, this magnetic valve is provided with the magnetic valve frequency converter be connected with solenoid-driven; Described executing agency also includes the primary air fan frequency converter driving with primary air fan and be connected, and drives with overfire air fan the overfire air fan frequency converter be connected,
Described controlling organization includes with lower unit:
Multiple temperature sensor, is uniformly distributed and is arranged in the furnace chamber of gas generator, and output furnace cavity temperature signal;
Magnetic-float type liquid level meter, is arranged in water leg drum, for detecting water level in drum, and defeated water level signal;
Master controller;
Memory cell, described memory cell is connected on master controller, for storing the coordination instruction of primary air fan and overfire air fan, described master controller is according to coordination instruction, and coordination instruction is passed to PLC cyclelog, be provided with PID Intelligent adjustment module in this PLC cyclelog, described PLC cyclelog exports control instruction, and is connected with primary air fan frequency converter, overfire air fan transducer drive and coordinates;
The cavity temperature signal of described multiple temperature sensors is connected to master controller by CAN input, the cavity temperature signal of this master controller to temperature sensor processes, and produce execution instruction, execution instruction is passed to PLC cyclelog, PID Intelligent adjustment module is provided with in this PLC cyclelog, described PLC cyclelog exports control instruction, and drives to be connected with electric control valve and coordinate; The water level signal of described magnetic-float type liquid level meter is connected to master controller by CAN input, the water level signal of this master controller to magnetic-float type liquid level meter processes, and produce execution instruction, execution instruction is passed to PLC cyclelog, described PLC cyclelog exports control instruction, and is connected with magnetic valve Frequency Converter Control and coordinates.
By this setting, the saturated vapor that water leg produces enters into gas generator by saturated vapor pipeline, utilize the unit coordinated such as temperature sensor, master controller, PLC cyclelog, drive motorized adjustment valve events, realize regulating the saturated vapor flow in saturated vapor pipeline, and then the saturation temperature in control gas generator, make its stable state, thus ensure efficiently carrying out of gas burner internal-response.In addition, magnetic-float type liquid level meter is utilized to detect the water level of drum, and water level signal is outputted to the unit such as master controller, PLC cyclelog and carry out computing and coordinated, drive electromagnetic valve switch, and then water leg supplied water and stops water supply action, thus have water in guarantee water leg, and then ensure that normally carrying out of gas burner internal-response always.And the Collaborative Control to the water level of drum and the flow of saturated vapor can also be realized by master controller, ensure the normal operation of gas generator.In addition, by the coordination instruction of First air and Secondary Air is stored in memory cell, and control primary air fan frequency converter and the action of overfire air fan frequency converter coordinate synchronization respectively according to master controller, an air intake and secondary air Phase Proportion are coordinated, operating automation degree is high, and has ensured the efficiency of combustion of steam boiler.
Further setting is that gas pipeline is provided with gravitational precipitator.
Further setting is that described steam outlet pipe is provided with steam pressure sensor, and exports steam pressure signal, and the steam pressure signal of this steam pressure sensor is connected to master controller by CAN input.By this setting, utilize steam pressure sensor data, make master controller to control the amount of primary air fan, ensure the stable of steam output pressure.
Further setting is that described negative pressure induced wind machine is connected with negative pressure induced wind machine frequency converter, this negative pressure induced wind machine frequency converter with
The PLC cyclelog of master controller drives to connect and coordinates.By this setting, just firing action instruction can be stored in memory cell, and control overfire air fan frequency converter, negative pressure induced wind machine frequency converter and ignition respectively according to master controller and sequentially carry out firing action, automaticity is high, and operational stability is good.
In sum, advantage of the present invention is that automaticity is high, and gas reforming rate is high, and stable equipment operation is good.
Below in conjunction with specification drawings and specific embodiments, the present invention is described further.
Accompanying drawing explanation
Fig. 1 specific embodiment of the invention structural plan;
Fig. 2 specific embodiment of the invention theory diagram.
Detailed description of the invention
Below by embodiment, the present invention is specifically described; only be used to further illustrate the present invention; can not be interpreted as limiting the scope of the present invention, the technician in this field can make some nonessential improvement and adjustment according to the content of foregoing invention to the present invention.
The specific embodiment of the invention as shown in Figure 1-2, include gas generator 1 and steam boiler 2, the two is connected by gas pipeline 11, described steam boiler 2 is provided with steam outlet pipe 21, burner 22 and ignition 23 is provided with in this steam boiler 2, water leg 12 is arranged with outside gas generator 1, also comprise water leg drum 121, an air inlet mechanism, secondary air mechanism and negative pressure induced wind machine 24, this water leg drum 121 is connected by water leg water supply line 122 with water leg 12, this air inlet mechanism includes primary air fan 13 and is connected to a blast pipe 131 on primary air fan, the port of export of a described blast pipe 131 is communicated with the furnace chamber of gas generator 1, described secondary air mechanism includes overfire air fan 25 and secondary air channel 251, the port of export of this secondary air channel 251 is connected with steam boiler, described negative pressure induced wind machine 24 is communicated with by the burner hearth of negative pressure induced wind pipe 241 with steam boiler 2, described water leg 12 is provided with saturated vapor pipeline 123, the output of this saturated vapor pipeline 123 is connected with the furnace chamber of gas generator 1, the height of the relative water side of water leg drum 121 of this water leg water supply line 122 is higher than the height of water leg water supply line 122 water inlet end of water leg 12 relatively, also include controlling organization and executing agency,
Described executing agency includes the electric control valve 1231 be arranged on saturated vapor pipeline and the magnetic valve 1221 be arranged on water leg water supply line 122, this magnetic valve 1221 is provided with the magnetic valve frequency converter 1222 be connected with solenoid-driven; Described executing agency also includes and drives with primary air fan 13 the primary air fan frequency converter 132 be connected, and drives with overfire air fan 25 the overfire air fan frequency converter 252 be connected,
Described controlling organization includes with lower unit:
Multiple temperature sensor 31, is uniformly distributed and is arranged in the furnace chamber of gas generator, and output furnace cavity temperature signal;
Magnetic-float type liquid level meter 32, is arranged in water leg drum 121, for detecting water level in drum, and defeated water level signal;
Master controller 33;
Memory cell 34, described memory cell is connected on master controller, and for storing the coordination instruction of primary air fan and overfire air fan, this memory cell 34 can also store igniting action command simultaneously.
The cavity temperature signal of described multiple temperature sensors 31 is connected to master controller by CAN 37 input, the cavity temperature signal of this master controller to temperature sensor processes, and produce execution instruction, execution instruction is passed to PLC cyclelog 35, PID Intelligent adjustment module 351 is provided with in this PLC cyclelog, described PLC cyclelog exports control instruction, and drives to be connected with electric control valve 1231 and coordinate; The water level signal of described magnetic-float type liquid level meter 32 is connected to master controller 33 by CAN input, the water level signal of this master controller to magnetic-float type liquid level meter processes, and produce execution instruction, execution instruction is passed to PLC cyclelog 35, described PLC cyclelog exports control instruction, and coordinates with magnetic valve frequency converter 1222 control connection.Master controller 33 described in the present embodiment adopts the ARM7TDMI-S microcontroller LPC2368 of NXP company, and described CAN preferably adopts Philips company model to be the CAN of SJA1000.
In addition, the steam outlet pipe described in the present embodiment is provided with steam pressure sensor 36, and exports steam pressure signal, the steam pressure signal of this steam pressure sensor 36 is connected to master controller 32 by CAN input.Described negative pressure induced wind machine 24 is connected with negative pressure induced wind machine frequency converter 242, this negative pressure induced wind machine frequency converter 242 drives to be connected with the PLC cyclelog of master controller and coordinates.
In addition, the present embodiment gas pipeline 11 is provided with gravitational precipitator 111.In addition, the master controller described in the present embodiment is also connected with LCD display 38, keyboard interface 39.
Claims (4)
1. the coal gasification direct-combustion boiler controlled based on PLC, coal gasification direct-combustion boiler includes gas generator and steam boiler, the two is connected by gas pipeline, described steam boiler is provided with steam outlet pipe, burner and ignition is provided with in this steam boiler, water leg is arranged with outside gas generator, also comprise water leg drum, an air inlet mechanism, secondary air mechanism and negative pressure induced wind machine, this water leg drum is connected by water leg water supply line with water leg, this air inlet mechanism includes primary air fan and is connected to a blast pipe on primary air fan, the described port of export of a blast pipe is communicated with the furnace chamber of gas generator, described secondary air mechanism includes overfire air fan and secondary air channel, the port of export of this secondary air channel is connected with steam boiler, described negative pressure induced wind machine is communicated with the burner hearth of steam boiler by negative pressure induced wind pipe, it is characterized in that: described water leg is provided with saturated vapor pipeline, the output of this saturated vapor pipeline is connected with the furnace chamber of gas generator, water leg water supply line relative to the height of the water side of water leg drum higher than the height of the water inlet end of the relative water leg of water leg water supply line, also include controlling organization and executing agency,
Described executing agency includes the electric control valve be arranged on saturated vapor pipeline and the magnetic valve be arranged on water leg water supply line, this magnetic valve is provided with the magnetic valve frequency converter be connected with solenoid-driven; Described executing agency also includes the primary air fan frequency converter driving with primary air fan and be connected, and drives with overfire air fan the overfire air fan frequency converter be connected,
Described controlling organization includes with lower unit:
Multiple temperature sensor, is uniformly distributed and is arranged in the furnace chamber of gas generator, and output furnace cavity temperature signal;
Magnetic-float type liquid level meter, is arranged in water leg drum, for detecting water level in drum, and exports water level signal;
Master controller;
Memory cell, described memory cell is connected on master controller, for storing the coordination instruction of primary air fan and overfire air fan, described master controller is according to coordination instruction, and coordination instruction is passed to PLC cyclelog, be provided with PID Intelligent adjustment module in this PLC cyclelog, described PLC cyclelog exports control instruction, and is connected with primary air fan frequency converter, overfire air fan transducer drive and coordinates;
The cavity temperature signal of described multiple temperature sensors is connected to master controller by CAN input, the cavity temperature signal of this master controller to temperature sensor processes, and produce execution instruction, execution instruction is passed to PLC cyclelog, PID Intelligent adjustment module is provided with in this PLC cyclelog, described PLC cyclelog exports control instruction, and drives to be connected with electric control valve and coordinate; The water level signal of described magnetic-float type liquid level meter is connected to master controller by CAN input, the water level signal of this master controller to magnetic-float type liquid level meter processes, and produce execution instruction, execution instruction is passed to PLC cyclelog, described PLC cyclelog exports control instruction, and is connected with magnetic valve Frequency Converter Control and coordinates.
2. a kind of coal gasification direct-combustion boiler controlled based on PLC according to claim 1, is characterized in that: gas pipeline is provided with gravitational precipitator.
3. a kind of coal gasification direct-combustion boiler controlled based on PLC according to claim 1, it is characterized in that: described steam outlet pipe is provided with steam pressure sensor, and exporting steam pressure signal, the steam pressure signal of this steam pressure sensor is connected to master controller by CAN input.
4. according to claim 1 a kind of based on PLC control coal gasification direct-combustion boiler, it is characterized in that: described negative pressure induced wind machine is connected with negative pressure induced wind machine frequency converter, this negative pressure induced wind machine frequency converter with
The PLC cyclelog of master controller drives to connect and coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316975.0A CN103423731B (en) | 2013-07-24 | 2013-07-24 | Coal gasification direct combustion boiler based on PLC control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310316975.0A CN103423731B (en) | 2013-07-24 | 2013-07-24 | Coal gasification direct combustion boiler based on PLC control |
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| CN103423731A CN103423731A (en) | 2013-12-04 |
| CN103423731B true CN103423731B (en) | 2015-02-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103939880B (en) * | 2014-04-14 | 2016-01-06 | 东莞市百大新能源股份有限公司 | A kind of self-adapting intelligent control method of gasification of biomass thermal power transfer system |
| CN106919199A (en) * | 2017-04-13 | 2017-07-04 | 江阴振宏重型锻造有限公司 | Gas heating forging control system and its control method of a kind of wind power principal axis |
| CN109519914A (en) * | 2018-11-27 | 2019-03-26 | 莫津 | Biomass automatic control combustion machine multifunctional furnace body device |
| CN112344520A (en) * | 2020-10-19 | 2021-02-09 | 南京福加自动化科技有限公司 | Environment energy-saving system intelligent controller based on artificial intelligence algorithm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH089717B2 (en) * | 1993-12-28 | 1996-01-31 | バブコック日立株式会社 | Airflow layer gasifier |
| CN2228485Y (en) * | 1995-04-17 | 1996-06-05 | 韦瑞生 | Continuous water-gas generating furnace |
| CN101581496B (en) * | 2009-04-03 | 2011-01-12 | 戴增琦 | Coal gasification direct-fired boiler |
| CN201901661U (en) * | 2010-12-13 | 2011-07-20 | 魏占强 | Direct-fired type gas producer |
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Granted publication date: 20150204 Termination date: 20200724 |